SM = 1 pin hibernate not working


Hi, I have one xbee end device API with SM=1 option with following settings:

SM=1 (Pin hibernate)
ST=1F4 (500msec awaked)
IR=3E8 (1sec for Sampling time;just one data packet )

Then In the Coordinator API I set the same PANID ,DH=0,DL=ffff to receive from any end device !
The problem is that when i put the dtr to ground ,on end device ,no packets are received into the coordinator terminal! I wonder if I have to set other parameters into the coordinator profile (like SP or SN)!

An help will be appreciated ,
thanks in advance!

make sure that your input on pin 9 is continuous and just not a pulse.